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A/B TestingHigh complexity

VWO

by vwo

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Sets cookies
Yes
Sends PII
No
Cross-site tracking
No
Consent required
Analytics
Cookies
_vwo_uuid_v2_vis_opt_exp_XXXXX_combi_vis_opt_s_vis_opt_test_cookie

Overview

A/B testing and conversion optimisation platform (Visual Website Optimizer) by Wingify. Provides A/B testing, multivariate testing, split URL testing, and personalisation. Uses a visual editor for creating test variations without code changes. Merged with AB Tasty in January 2026 under Everstone Capital.

Detection capabilities

Signature count
2
Detection methods
pagenetwork
Property types
script_srchostnamepathname

Performance impact

Performance Impact

Script size
70 KB
Requests per page
1

Common mistakes

  • 1Running the VWO SmartCode before consent, which modifies page content and sets cookies immediately
  • 2Not distinguishing between functional A/B tests and personalisation experiments in consent settings
  • 3Using VWO's heatmap and session recording features without obtaining appropriate consent for those features

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